Travel In Style Holidays taken money without authorisation

Travel In Style debit my credit card without any authorisation. I have been battling to get my money back from them for the last four weeks. I have sent numerous emails to *** and contacted them on ***/1 and battle to get any feedback or response. When I eventually contact someone, I get conflicting stories and still no definite answers. I asked them to speak to the head of finance or the manager, and they indicated that someone would phone me and still no response. What makes it worse is that they acknowledge that it should not have happened and said they had disciplined the agent, who is all fine, but I still have not received my money.